Dep. Chief Finn estimated that around 225 passengers were evacuated from the six-car train. No injuries were reported.

When the train came to a stop near the beginning of the tunnel, passengers said they could see and smell smoke.

(credit: @bostonfire/Boston Fire Department)

“There were small, almost-like explosions, and then very acrid smoke,” said Bernadette Orr, a passenger.

Passengers said that while they heard officials chatting about the fire, no information or directions were relayed to them.

“There were so many teenagers commuting from school. They panicked, and they came running through. People were trying to break the doors, and there was absolutely no instruction from the MBTA,” said Orr.